Pre-Test

Chapter 23: The Evolution of Populations

Pre-Test

1 .

What is the term for a change in the relative frequencies of alleles in a population from generation to generation? (Concept 23.1

) [Hint]

gene pool

independent assortment

macroevolution

reservoir

microevolution

2 .

Darwin's and Mendel's ideas of inheritance _____. (Concept 23.1

) [Hint]

were amazingly similar

contradict each other too much to be compared

were eventually reconciled by geneticists when it was discovered that quantitative characters are influenced by multiple genetic loci

both contributed to the blending hypothesis

both support that evolution occurs at the individual level

3 .

The relationship of genome to organism is the same as that of _____ to population. (Concept 23.1

) [Hint]

species

gene

gene pool

mutation

variation

4 .

According to the Hardy-Weinberg theorem, the frequencies of alleles in a population will remain constant if _____ is the only process that affects the gene pool. (Concept 23.1

) [Hint]

mutation

genetic drift

sexual reproduction

microevolution

natural selection

5 .

The original source of all genetic variation is _____. (Concept 23.3

) [Hint]

mutation

meiosis

sexual reproduction

natural selection

recombination

6 .

The evolutionary effects of genetic drift are greatest when _____. (Concept 23.3

) [Hint]

the population size is large

intraspecific competition is intense

the population size is small

intraspecific competition is weak

sexual selection occurs

7 .

What situation most likely explains the occasional high frequency of certain inherited disorders among human populations established by a small population? (Concept 23.3

) [Hint]

bottleneck effect

founder effect

gene flow

mutation

nucleotide variability

8 .

Rabbits living farther north tend to have smaller ears. This is an example of _____. (Concept 23.4

) [Hint]

a cline

polymorphism

artificial selection

heterozygote advantage

genetic drift

9 .

In evolutionary terms, an organism's fitness is measured by its _____. (Concept 23.4

) [Hint]

health

contribution to the gene pool of the next generation

mutation rate

genetic variability

stability in the face of environmental change

10 .

Blue poppies native to China were grown at a plant-breeding center in California. The plants with the thickest leaves were most likely to survive and reproduce in the drier climate. This adaptation of the poppies to their new environment is due to _____. (Concept 23.4

) [Hint]

genetic drift

stabilizing selection

directional selection

neutral variation

disruptive selection